Spraying device.



J. W. RANSON & O. A. GERSTUNG.

SPRAYING DEVICE.

APPLICATION FILED MAYaI. I9I1.

1 ,300,0 1 4 Patented Apr. 8, 1919.

ila

JAMES W. RANSONAND OTTO A. GERSTUNG, OF CHICAGO, ILLINOIS, ASSIGNORS TO THE BBOLT LABORATORIES, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

srnnvine DEVICE.

Laconia.,

Patented Apr., d, i919.

I Application led May 31, 191'?. Serial No. 171,890.

To all whom it may concern.'

vBe it known that we, JAMES W. BANsoN 'and @Tiro A. GERSTUNG, both citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and vuseful Improvements in Sprayin Devices,of which the following is a speci cation.

Uur invention relates to improvements in spraying devices, and is particularly suited for use as a hand apparatus for spraying* surgical and medicinal pre-parations.-

@ne 'of the objects of the invention is to provide an improved spraying device p'articularly suitable for spraying liquids which occur in solid form at ordinary atmospheric temperatures. Subsidiary objects of the in? vention are to rovide an arrangement of the class descr'g ed, so Vorganized that substantially the full amount of the charge may be utilized; to provide an improved arrangement' of the class described capable of being operated by hand; to provide animproved construction so organized that pressure may be introduced into the apparatus through the, handle of the deviceto provide 'an improved construction capa le of being manipulated conveniently .and eiiiciently without the expenditure 'of undue effort or concentraa tion on the part of the operator; to provide a construction of the class described which embodies very few parts, and those of simple and practical design; to vprovide an improved construction which shall be economi- 1 cal to manufacture and yet extremely edicient in use and economical to operate and maintain; and, in generai, to provide an inipro-ved swaying device of the character referred to.,

In the drawings- `Eigure 1 is a side view of the compietedevice; l

Fig. 2 is a longitudinal vertical section or the principal parts oi the device; and

Fig. 3 is a section taken on the line 3-5 of Fi 1 2e "erring to the drawings, 10 represents a of the said-tank does not involve any novel l mechanieai problem. maybe made from a single section ofie tubing with the bottom 11 and top i2 separately made and subsequently united to the body section; or one oi' the between the neck 13 and the cap 14 to form a hermetic closure.

Describingl the nozzle and associated parts, 16 is a brass sleeve, the outer end of which is threaded, yas shown at 17and screwed into the side of the tank 10 where the shoulder i 18 bears against the inside surface of the tank wall. A. nut 19 screwed onto the outside ci' the threaded portion 17 locks the sleeve 16 securely in place. It is understood that in order to make a-perfectly air-ti ht iit, solder orother suitable means may Ee employed. On the nose of the threaded portion 17 is also screwed the lnozzle proper 20, the latter having its end curved, as shown at 21, and perforated with a small inclined port 22, the` inner end of said port being substantially coincident with the axis of the tube 16.

Theliquid, which is introduced into the casing 10 through the lling hole at the top of the tank, is conducted to the vicinity of the nozzle 20 by means of a small Lshaped copper tube 23, the upper horizontal limb of which is a rather loose fit in the longitudinal hole drilledin the Sleeve 16. Preferably, the end of the feed tube 23 is rounded slightly, as

shown at 24,' and perforated with a hole. .smaller in'diameter than the interior diameter of the tubing.. so as to deliver the liquid in a small jet. Thelo-wer end of the feed' tube 23 is open, as shown in Fig. 2, and eX tends almost to the botto-m of the tank 10,

the horizontal arm di! the tube being of such oblique guard plate or shield 25, one end of which is suitably secured to the top of the sleeve i6.

Pressure to operate the device, in the pres- .ent instance, is supplied in the form of air by means of an ordinary bicycle pump 26,-- that is to say, a pump used for infiating pneumatic of' bicycles or motorcycies.

:The said pump 26 is-preferably dtted at its Reardischarging1 end with a plug 2'2" threaded internally to screw onto a threaded neck 28 of a iitting 22 threaded on its inner end, as

shown at 30, to screw into a nut 31 soldered to the inside of the tank and to the inner tubular extension 32 of the tting 29. The outer end ofthe fitting 29 has a shoulder or flange 33 to facilitate the mounting of said fitting in the side of the tank and the tting as a whole is drilled out longitudinally, as shown.' at 34, the innerend of the hole in the fitting being beveled at a suitable angle, as shown atA 35, in order to provide a valve seat for the valve ball 36, constituting in effect a check to prevent egress of air. The inner end of the tubular extension 32 is ianged over slightly, as shown at 37, the end of the tube being open; and, if desired, action of the check ball 36 may be made somewhat more coil spring 38. A

The operation of theldevice is simplicity itself. The liquid to be sprayed is inserted into the tank by removing the filling cap 14:, which is subsequently screwed down tightly so as to seal the tank. The main body of the tank 26 constitutes a handle by which the device may be manipulated or pointed to spray material upon any desired area, while the handle 39 of the pump isy moved back and forth to reciprocate the pum spindle 40 inthe usual manner so as to ciarge the tank with air under considerable pressure.

By reason of the hole 22 being open, the air t rushes out of the ynozzle through the 'small crevice between the feed tube 23` and the sleeve'16, and, owing to the friction of the air through said restricted passageway causing a distinct loss qf pressure, liquid is forced up the tube 23 and out of the perforation in the end 24 of the feed tube. The compressed air, as it passes the end 24 on its way to the nozzle, atomizes the jet of liquid issuing from the feed tube and the air charged with the particles of liquid thus produced issues from the nozzle aperture 22 in a' cone-shaped spray 41.

It willbe observed that the axes of the pump 26 and of the nozzle ,are in alinemeiit and that the feed tube 23 is loosely supportediir the `'sleeve 16 so that it may rotate or swing in the sleeve 16 when the tank 10 is tilted orswung about the axis of the pump 26. This permits thelower end of the feed tube 23 to, in effect, follow the liquid in the bottom of the tank so that practically the entire contents may be discharged, even though the tank be held in an inclinedposition. The object of extending the tubes 16 and 32' toward the axis of the tank for a considerable distance from the side of the tank, is to prevent liquid from owinginto the 'ends of said tubes when the device is held with the handle in inclined position. The guard 25 is also made of sufficient diinensions to prevent the pump from throwing liquid 'into the open end of'the tube 16 and thereby causing the .nozzleto spit withpositive by means of a light out atomizing the liquid. In the particular embodiment shown, it will be observed that the nozzle aperture 22 is inclinedA so as to deliver the spray in a-direction at an angle to the axis of the nozzle tube 16 and the axis of the pump or handle. This is an important feature in certain cases, where the spray must be directed under,'over, or onto the side of an object. It will therefore be manifest that the swinging possibility of the feed tube 23, in order to enable it to follow liquid as the ydevice is rocked on the axis .of the pump 26 to direct the spray into different directions, is an important andv highly desirable feature of our invention. A device of the general construction indicated herein is of particular value in spraying liquids formed by heating above the melting point materials which are normally solid at ordinary atmospheric temperatures. For instance, there has recently been discovered for surgical purposes a method of treating burns, which consists in applying to the surface'of the burn a coating of more or less inert Wax-like material which, in order to secure the best results and to prevent unnecessary pain, should preferably be applied in the form of a spray. The Yspraying of suoli material, which has a melting point considerably higher than the temperature of the body, obviously presents more or less difficulty, since the fluid material and the vaiious parts with which it may come in contact before being sprayed onto the burn, must be maintained at a temperature higher than that of the melting point of the substance. ln the construction herein described, no difficulty is encountered in this connection, for the reason that the principal parts of the device are preferably made of comparatively thick metal having a high heat conductivity,

'such'as'brass or copper, such metal also being capable of receiving a polished nickel coating to good advantage, which also prevents radiation of heat 4and enables the liquid to maintain itself in melted and sprayable condition for long periods. For 1nstance, with a tank only three inches in diameter, no additional heat need be supplied for a period of thirty minutes, or even longer in certain cases.

The device also has another important advantage,iin that the tank may be reversed after it has been filled with the hot liquid sol as to permit the liquid to warm up the various parts at the top of the apparatus, thus effecting a saving of time which would othtermined by reference to the appendedl claims.

We claimy l. In a spraying device, the combination of a cylindrical tank having its axis vertical, a nozzle projecting outwardly from one side of said tank, a tube projecting inwardly into the tank and constituting a conduit for conducting the air to said nozzle from the interior of the tank, a feed tube open at both ends, having one end extending into said air tube for a substantial percentage of its length and the other end bent down to dip into liquid contained within said tank and adapted to swing about the axis of the air tube, and means for forcing air into said tank.

2. In a spraying device, the combination of a cylindrical tank havin its axis vertical, a nozzle projecting outwar ly from one side of said tank, a tube projecting inwardly into the tank and constituting a conduit for conducting air to said nozzle from the interior of the tank, a feed tube open at both ends,Y having one end extending into said air tube for a substantial percentage of its llength and the other end bent down to dip into' liquid contained within said tank and adapted to swing about the axis of the air tube, means for forcing air into said tank, and a guard provided on the inner end of said air tube to maintain said feed tube in position.

3. In a spraying device, the combination of a cylindrical tank having its axis vertical, a nozzle projecting outwardly from one side of said tank, a tube projecting inwardly into the tank and constituting a conduit for conducting air to said nozzle from the interior of the tank, a feed tube open lat both ends, having one end extending into said air tube for a substantial percentage of its length and the other end bent down to dip into liquid contained within said tank and adapted to swing about the axis of the air tube, means for forcing air into said tank, and a guard provided on the inner end of said air d.;

tube to maintain said feed tube in position and arranged to protect the open end of the air tube.

JAMES `W. RANSON. OTTO A. GERSTUNG. 

